Cutter head for tube cleaners



H. STALEY CUTTER HEAD FOR TUBE CLEANERS Filed Jan. 2. 1923 E 11 MM5/YM? Patented @et 30, i923@ stares este HARRISON L. STALEY, F MARTINSVILLE, INDIANA, ASSIGNOR TO THE .ROTO COIL.- PANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CUTTER VHEAD FOR TUBE CLEANERS.

Application led January 2, ,1923i To all whom t may concern.'

Be it known that I, HARRISON L. STALEY, a citizen of the United Statearesiding at Martinsville, in the county 0f Morgan and State of Indiana, have invented a new and useful Improvement in Cutter `Heads tor Tube Cleaners, of which the following is a specification.

This invention relates to the type of motor rotated cutter heads for cleaning depositl from the interiors of the-tubes of boilers7 condensers7 evaporators and the like apparatus7 which havecutters 'mounted on the ends of arms that are pivoted to the motor rotated body by transversely extending pivotsiin such manner that. the cutters oscillate radially due to centrifugal action when rotated in the tubes for engaging and dislodging the deposit therefro The cutters of devices oflthis character dull and break during use and trom time to time it is necessary to remove the old cutters and replacethem with new cutters It isalso sometimes necessary to renew the arms which carry the cutters. Wherev the deposit is hard such substitution is required to be made quite frequently. In some types of apparatus the tubes are made of soft metal and in cleaning such tubes it is essential that they be protected from being injured by the cutters.

The object of this invention is to provide a construction whereby the head may be made and assembled by the manufacturers very cheaply, and worn or broken cutters and arms may be easily removed and new parts quickly substituted by the user, which construction also allows ,the extent of expansion or outward throw of the cutters to be readily predetermined in a very simple manner so that the cutters may be adjusted to the dianieterof the tubes and the charaeter ot the tubes with which they are to be used.

In the accompanying drawings Figure 1 shows a side view of a cutter head constructed according to this invention. Fig. 2 shows a central section of thehead. Fig. 3 shows an end view of the head. Fig. 4- 5 shows a transverse section on the plane indicated by the dotted line 4-4f on Fig. 1.

The body 5, or spider as it is commonly termed, of the head illustrated has a threaded stem 6 by means of which it may be fastened to the driving motor. Extending lon- Serial No. 610,112.

gitudinally in the sides ofthe body .are tour' grooves 7 and pivoted in these grooves are tour arms 8. The arm pivots 9 whichextend transversely ot' the axis of the head through the walls of the body at the sides of the grooves are larger at their ends than at the center and are itted so they may be easily driven into or out of place. .Fach arm hasV a longitudinal bore for receiving the headed bolt 10 which carries the cutter 11. VA pin 12 is driven through each arm and each cutter bolt to hold the cutterbolt in place. The inner end` of each cutter bolt is forked and the bolt is of such lengthuthat when in place the fork straddles the lportion of the arm pivot thatV is reduced in diameter. The pivots are rst` thrust through the arms so as to retain'them in position. Then cutter bolts with the cutters rotatably mounted on them are thrust into the' arms and the pins driven through the arms and bolts. With the bolts fastened in this man ner it is impossible for the arm pivots to slip out of place7 they being held from iongitudinal movement by thev engagement with their reduced sections 'of the V'forked ends of the bolts.

Each arm is extendedbeyondv its pivot and the inner side of this endis out away,

' as at 13, so that the end otthe arm bearing the cutter may swing outward. A ringl 14Y is slipped on the stein ot the body. This ring is of suoli diameter that it will limit the outward swingoi the cutters. Betere this ring is placed in position the arms can swing open sufficiently to allow tie pins to be driven through the arms and the cutter bolts. After the parts have been assembled with the pivots that retain the arms. held in place by the bolts` which carry the cutters, and the bolts secured by the pins. the ring is slipped upon the stem. -When the ring is in place it is engaged by the exten sions on the ends ot the arms in such manner that the arms cannot swing out tar enough to carry the pins whichhold the bolts beyond the edges of the walls of the `grooves in which the arms are pivot-ed. that is. after the ring has lleon placed en the stern the bolt pins are held 'troni moving either way out or' place by the side walls et the grooves. B v using` rings ot' diilerent diameters the outward throw ot the cutters may be regulated.` that is. it it is desired to have the cutters swing out a relatively great l distance the ring may be smallfin diameter,

y ly to allow the ring while Vif it is desired to prevent the cutters from swinging out so may be placed on the stem.

In order to substitute new cutters the head is screwed olf frointhe motor suiicient to be drawn back beyond the extension of the arms. Then the arms can be swung out far enough to permit the pins to be ,driven out andthe bolts re- Y prevented from opening the pins to slip out by'thering on the stem. Y

have been put in andthe bolts returned and pined the head may be l l to crowd the ring forward and prevent the arms from opening suff'ioiently'far to allow moved. After new cutters the pins to become displaced. It a new arm Y The invention claimed is; 1. A tube cleaner cutter head comprising Va body having longitudinally Vextending Y grooves,

arms pivotally held in said grooves, cutter bolts extending intovsaid arms and adapted to engage and hold the arm pivots in position, pins extending through the arms and bolts for holding the latter in position, and adjustablefmea'ns on the head for enswinging out suiiiciently far to carry the that they will engage Vtlieinner walls of the tubes a larger` ring again screwed onto the motor so asu the bolts removed the arm.

.of the arms. gaging and preventing the, arms from bolt pins beyond the walls of theV grooves supporting the arms. Y l

QyAY tube cleaneroutter head comprising a body having longitudinally extending grooves, arms pivot-,ally lield'insaidgrooves',

cutter bolts extending into said arms and Y adapted to engage and in positiompins extending through the arms and bolts for 'holding the latter in position and a loose ring on thehead for engaging the ends of the arms and preventing them from swinging out su'liiciently tar to carry the pins beyond the walls of the 'grooves supporting thelarms. Y'

'SpA tube cleaner cutter head comprising tov the body, cutter l a body, arms pivoted bolts extending into to engage `and hold the arm pivots in posi tion, and pins extending through the arms and bolts for holding the latterin place.

4. A=tube cleaner Cutter headV comprising lioldl the arm pivots said arms and adapted Y a body, arms pivoted to the. body,cutter bolts extending into said arms and adapted to engage Vand hold the armV .pivots in position, means for holding kthe bolts'in place, andy a ring on thel head for engaging the ends of the arms and limitingftheir out-V Vward swing.v

5. A tube cleaner `cutter head Vcomprising a body having 4longitudinally extending grooves, arms pivotally held in said grooves, cutter bolts extending intoY saidV arms, pins extending through the arms and bolts for holding the latter inpo'sitiomsaid pins being held from removal by the walls of the groovessupporting theV arms, Vand removable means for limiting the outward swing f HARRISON L. STALEY. 

